Nice progress! Once I go through a couple deloads I may move to SL since there is more volume. GSLP is basically starting strength so just 3x5.

We definitely started with a different base level of strength if you are intermediate already! Have you been following the 5/2.5 increase strictly?

That is true, I used to lift weights in HS (17-18 yo, now 24). I have followed the 2.5/5kg strictly, but stopped adding weight to squats until I improve form (I sometimes bend lower back to compensate).

I recommend the program because its really simple. I haven't tested it against other programs' results but this one seems effective.