Changed grgsm install directories and prefixes from "gsm" to "grgsm". The old prefix caused conflicts with libraries already available.
diff --git a/grc/receiver/gsm_sch_detector.xml b/grc/receiver/gsm_sch_detector.xml
index 902835b..7333a6e 100644
--- a/grc/receiver/gsm_sch_detector.xml
+++ b/grc/receiver/gsm_sch_detector.xml
@@ -2,8 +2,8 @@
 <block>
   <name>SCH bursts detector</name>
   <key>gsm_sch_detector</key>
-  <import>import gsm</import>
-  <make>gsm.sch_detector($OSR)</make>
+  <import>import grgsm</import>
+  <make>grgsm.sch_detector($OSR)</make>
   <callback>set_OSR($OSR)</callback>
   <param>
     <name>OSR</name>