there is a way... via wet chemistry... use Gallium Chloride and Lithium Nitride with some small amount of amine then add heat check a phase diagram to see how high you have to go , but i believe 290 C is good, however this is a recipe for nanocrystalline Ga with wurtzite structure... and should be dispersed in Chloroform or Toulene after being cleaned by an ethyl reflux. There are plenty of papers out there on "how to" ... don't be lazy... read them!