I haven't tried it, but first what version of Sigil? One has the music from buckethead and I don't know if this version of Zdoom plays it. The other has the midi version soundtrack from Jimmy.
I am trying to find PrBoom for GCW, I think there was a version. I have Chocolate Doom on the RG350 right now, but if I try (which I will) possibly it will fail because of visplanes limitation (but PrBoom might not have these).
Anyway,. I'll try later.
Also analogue and such, some of these ports are straight copies from GCW without altering the code to support analog.