Changed grgsm install directories and prefixes from "gsm" to "grgsm". The old prefix caused conflicts with libraries already available.
diff --git a/grc/demapping/gsm_universal_ctrl_chans_demapper.xml b/grc/demapping/gsm_universal_ctrl_chans_demapper.xml
index 48b0f83..52f12d6 100644
--- a/grc/demapping/gsm_universal_ctrl_chans_demapper.xml
+++ b/grc/demapping/gsm_universal_ctrl_chans_demapper.xml
@@ -2,8 +2,8 @@
 <block>
   <name>Universal ctrl chans demapper</name>
   <key>gsm_universal_ctrl_chans_demapper</key>
-  <import>import gsm</import>
-  <make>gsm.universal_ctrl_chans_demapper($starts_fn_mod51, $channel_types)</make>
+  <import>import grgsm</import>
+  <make>grgsm.universal_ctrl_chans_demapper($starts_fn_mod51, $channel_types)</make>
 
   <param>
     <name>starts_fn_mod51</name>