make GS use gls acronyms

GS.tex

@@ -39,7 +39,7 @@
 %---
 
 
-  \posterbox[adjusted title=Player Characters]{name=pcs,below=campaign,column=1,span=26,rowspan=4}{
+  \posterbox[adjusted title=\Glsentrylongpl{pc}]{name=pcs,below=campaign,column=1,span=26,rowspan=4}{
 
     \begin{tabularx}{\linewidth}{Y|Y|Y|l|Y}
     \hiderowcolors
@@ -59,7 +59,7 @@
 
 %---
 
-  \posterbox[adjusted title=Non Players Characters]{name=npcs,column=14,row=7,span=13,rowspan=4}{
+  \posterbox[adjusted title=\Glsentrylongpl{npc}]{name=npcs,column=14,row=7,span=13,rowspan=4}{
     \lineDots[10]
   }