Hello Dan and thank you for asking.
Actually, when HEC GeoHMS generates those files, I think it is already in GeoTIFF format. I dont know if I should put the file extension since in the instruction manual for HEC GeoHMS, it does not say to put file extensions to it.
When I designate the output file to be in a geodatabase, it does not generate an info folder.
I will try to put file extensions to it and reply back if works. Thanks for the idea!