I'm not sold on using the guildgates over something like Evolving Wilds / Terramorphic Expanse . They can really mess up your curve, and if you ever had to bounce one of your own lands for Kor Skyfisher you wouldn't have to worry about bouncing a gate. All of your colored mana costs for any given color are singular (no WW, RR, GG) so fetching an appropriate basic should be sufficient for any given color. A huge benefit of this would be that you can add Wild Nacatl and/or Kird Ape . Overall I like it, 3-color pauper decks are awesome!

So as not to confuse people, you may want to not label this as Standard.

Ok I failed sorry, I was looking at another deck >.<.

+1 for your troubles.