The 1900 certainly will and I can confirm that the Wilson 801247 amp is designed to amplify the G-block.
I bet the 800 antenna does as well but maybe not as well as an antenna specifically tuned for SMR bands.
This antenna is designed to amplify the 850 cellular band which is only slightly different in frequency than SMR when it comes to making antennas. However, what is key is that the amplifier supports SMR bands, which most do not! Amplifiers are very specific in their operating frequencies, so specific that Wilson warns that SMR users will see no gain from an 850 cellular amplifier like the 801247.
So basically, the antennas work fully but the amplifiers will only work partially (1900 only) unless you get a separate amplifier which is specifically designed for the SMR 800 (iden) band.
Edit: just fyi, Wilson does make Verizon 700mhz and ATT 700mhz LTE amplifiers.