In comparison to the other nearby YMCAs (Dowd, Childress) Gateway is a bit dwarfed. However, as Tm has pointed out, if you're looking for a quick, no fuss workout, this is a perfect place to go. Expect a fair amount of cardio equipment and a decent share of weighlifting machines - all clean and in good working order. You'll also find a small selection of benches and hand weights and a small area to stretch.
While I haven't made it to a class here as of yet, it's mainly because the Dowd is closer to my house. Parking can also be a bit difficult, so take heed of the restrictions & meter rules around here! If I'm in the area and need to fit in a fast, efficient workout, the Gateway Y is a great option!