I was reading the dedicated page for the question "Does your library come in other formats such as VST? (Kontakt, Halion, Mach 5, Vsampler, etc)?" which explains why it's only GIGA 3 format only .
Why don't you make a cut-down version that could be used on other samplers as well ? I mean , you have all the cool samples so the hardest part is already done -> all the velocity layers and the handpicked samps etc . You could make a "lite" version for other samplers ( Even giga studio 2.5 and / or Kontakt ) with Round Robin and such which would appeal to more semi-pro musicians and lower budget ( I don't know the price, but i suspect it must be quite high for what it's offering ) .