replace 2 (GTM , LTM-apm-asm) devices with 1 --

i want to replace a a 3900(LTM , APM , ASM) and a 1600(GTM) -- with a single i4800 device . the 3900 and 1600 units are on v12.1.3

 

Question 0-- i can restore the - 3900 config on the new device and that will deploy - LTM , ASM and APM .. how would i deploy the GTM config - meaning is there a way to partially import config or just add some components

 

Thanks M.