Lovely paper, texture depends on the surface that you have bought...all mine is glossy. The surfaces are in line with the Multigrade FB papers, semi matt and glossy. Really any good paper developer will work with Gallerie, I personally use Dektol or Ethol LPD, and the tone is considered neutral.
Bear in mind that this is a fixed grade fibre based paper and needs to be handled accordingly. The gd #3 will suit negs from normal to slightly low in contrast, depending of course on the enlarger you are using.
I am not familiar with Dokumol but Eukobrom will work fine, enjoy!