An isolated polypeptide having glucoamylase activity, selected from the group consisting of: (a) a polypeptide comprising an amino acid sequence having at least 85%, more preferably at least 86%, more preferably at least 87%, more preferably at least 88%, more preferably at least 89%, more preferably at least 90%, more preferably at least 91%, more preferably at least 92%, even more preferably at least 93%, most preferably at least 94%, and even most preferably at least 95%, such as at least 95%, at least 97%, at least 98%, at least 99% or even 100% identity to amino acids 18 to 573 of SEQ ID NO: 2, SEQ ID NO: 4, SEQ ID NO: 6, SEQ ID NO: 8, SEQ ID NO: 10, SEQ ID NO: 12, or SEQ ID NO: 14 or amino acids 18 to 576 of SEQ ID NO: 16 or SEQ ID NO: 18; (b) a polypeptide comprising an amino acid sequence having at least 85%, more preferably at least 86%, more preferably at least 87%, more preferably at least 88%, more preferably at least 89%, more preferably at least 90%, more preferably at least 91%, more preferably at least 92%, even more preferably at least 93%, most preferably at least 94%, and even most preferably at least 95%, such as at least 96%, at least 97%, at least 98%, at least 99% or even 100% identity to the catalytic domain shown as amino acids 19 to 474 of SEQ ID NO: 2, SEQ ID NO: 4, SEQ ID NO: 6, SEQ ID NO: 8, SEQ ID NO: 10, SEQ ID NO: 12, SEQ ID NO: 14 or amino acids 19 to 471 of SEQ ID NO: 16 or SEQ ID NO: 18; (c) a polypeptide encoded by a polynucleotide comprising a nucleotide sequence having at least 85%, more preferably at least 86%, more preferably at least 87%, more preferably at least 88%, more preferably at least 89%, more preferably at least 90%, more preferably at least 91%, more preferably at least 92%, even more preferably at least 93%, most preferably at least 94%, and even most preferably at least 95%, such as at least 96%, at least 97%, at least 98%, at least 99% or even 100% identity to the coding sequence of SEQ ID NO: 1, SEQ ID NO: 3, SEQ ID NO: 5, SEQ ID NO: 7, SEQ ID NO: 9, SEQ ID NO: 11, SEQ ID NO: 13, SEQ ID NO: 15, or SEQ ID NO: 17 encoding amino acids 18 to 573 of SEQ ID NO: 2, SEQ ID NO: 4, SEQ ID NO: 6, SEQ ID NO: 8, SEQ ID NO: 10, SEQ ID NO: 12, or SEQ ID NO: 14 or amino acids 18 to 576 of SEQ ID NO: 16 or SEQ ID NO: 18 (a) a polypeptide comprising an amino acid sequence having at least 85%, more preferably at least 86%, more preferably at least 87%, more preferably at least 88%, more preferably at least 89%, more preferably at least 90%, more preferably at least 91%, more preferably at least 92%, even more preferably at least 93%, most preferably at least 94%, and even most preferably at least 95%, such as at least 95%, at least 97%, at least 98%, at least 99% or even 100% identity to amino acids 18 to 573 of SEQ ID NO: 2, SEQ ID NO: 4, SEQ ID NO: 6, SEQ ID NO: 8, SEQ ID NO: 10, SEQ ID NO: 12, or SEQ ID NO: 14 or amino acids 18 to 576 of SEQ ID NO: 16 or SEQ ID NO: 18; (b) a polypeptide comprising an amino acid sequence having at least 85%, more preferably at least 86%, more preferably at least 87%, more preferably at least 88%, more preferably at least 89%, more preferably at least 90%, more preferably at least 91%, more preferably at least 92%, even more preferably at least 93%, most preferably at least 94%, and even most preferably at least 95%, such as at least 96%, at least 97%, at least 98%, at least 99% or even 100% identity to the catalytic domain shown as amino acids 19 to 474 of SEQ ID NO: 2, SEQ ID NO: 4, SEQ ID NO: 6, SEQ ID NO: 8, SEQ ID NO: 10, SEQ ID NO: 12, SEQ ID NO: 14 or amino acids 19 to 471 of SEQ ID NO: 16 or SEQ ID NO: 18; (c) a polypeptide encoded by a polynucleotide comprising a nucleotide sequence having at least 85%, more preferably at least 86%, more preferably at least 87%, more preferably at least 88%, more preferably at least 89%, more preferably at least 90%, more preferably at least 91%, more preferably at least 92%, even more preferably at least 93%, most preferably at least 94%, and even most preferably at least 95%, such as at least 96%, at least 97%, at least 98%, at least 99% or even 100% identity to the coding sequence of SEQ ID NO: 1, SEQ ID NO: 3, SEQ ID NO: 5, SEQ ID NO: 7, SEQ ID NO: 9, SEQ ID NO: 11, SEQ ID NO: 13, SEQ ID NO: 15, or SEQ ID NO: 17 encoding amino acids 18 to 573 of SEQ ID NO: 2, SEQ ID NO: 4, SEQ ID NO: 6, SEQ ID NO: 8, SEQ ID NO: 10, SEQ ID NO: 12, or SEQ ID NO: 14 or amino acids 18 to 576 of SEQ ID NO: 16 or SEQ ID NO: 18