Yes, you technically can.  Because to the very end of the threads it is 64 inches in length.  If you moved the top bracket half way down the threads you could get it to attach at 62 inches.  Also, you could flip the top bracket around to gain even a little more space.  So, instead of the top bracket pointing up, it would be pointing at the ground. But, a typically better solution would be to get a 6’ telescopic or an 8’ foot telescopic version so you could adjust the length of the brace for the perfect placement on your gate.