If the tool accepts fastq input, then .gz compressed data assigned to the datatype fastq.gz is appropriate.
If the tool accepts fastqsanger input, then .gz compressed data assigned to the datatype fastqsanger.gz is appropriate.
Using uncompressed fastq data is still an option with tools. The choice is yours.
TIP: Avoid labeling compressed data with an uncompressed datatype, and the reverse. Jobs using mismatched datatype versus actual format will fail with an error.