A PILOT DEPARTED IFR ON A COMPLEX SID. THE SID OMITTED A PORTION OF THE TEXTUALLY DESCRIBED DEPARTURE AND WHILE ON AUTOPILOT THE FLT DEVIATED FROM ITS TRACK BY PROCEEDING DIRECT TO A FIX WHEN IT SHOULD HAVE HELD A HDG.

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I DEPARTED ON AN IFR FLT PLAN FROM VNY ARPT ENRTE TO ZZZ ARPT AROUND XA00. MY CLRNC WAS USING CANOGA EIGHT DEPARTURE VIA GORMAN TRANSITION AND THEN DIRECT TO ZZZ CLB AND MAINTAIN 4000 FT; EXPECT 8000 FT. I CONFIRMED THE CLRNC INSTRUCTIONS. WHILE TAXIING I ASKED GND IF THERE ARE ANY LIMITATIONS ON THE DEP AND HE REMINDED ME I HAVE AN IFR CLRNC CANOGA EIGHT VIA GORMAN TRANSITION. I RECONFIRMED. I LOADED MY IFR CLRNC RTE INTO THE GARMIN GNS430. THIS INCLUDED THE CANOGA EIGHT VIA GORMAN TRANSITION. AFTER TAKING OFF FROM RWY 16R AT AROUND 1200 FT MSL I TURNED MY AUTOPLT ON (GPSS MODE) TO FOLLOW THE LOADED RTE. WHILE I CHKED MY FLAPS; LNDG LIGHT AND ENG PANEL I WAS TURNED OVER BY VNY TWR TO SOCAL DEP. I CONTACTED DEP AND WAS CLRED TO 8000 FT. FOLLOWING THAT I WAS INSTRUCTED TO TURN HDG 250 DEGS AND NOTIFIED THAT I WAS SUPPOSED TO CONTINUE ON HDG 210 DEGS. I LOOKED AT MY MFD AND NOTICED THE PLANE IS HDG TOWARDS IPIHO INTXN WHICH WAS PART OF THE LOADED DEP ON THE GPS. THE CTLR REMINDED ME THAT I WAS INSTRUCTED TO USE CANOGA8 VIA GORMAN TRANSITION AND THAT THE DEP INDICATES I SHOULD HAVE CONTINUED ON HDG 210 DEGS. THE CTLR TURNED ME TO 230 DEGS FOR TERRAIN CLRNC AND THEN CLRED ME TO GORMAN. THE CTLR TOLD ME THAT I WAS FLYING IN AN AREA THAT IS IN THE APCH PATH FOR LNDG INTO BUR AND IF THERE WOULD HAVE BEEN A PLANE LNDG IT COULD HAVE BEEN DANGEROUS. I HAVE CHKED THE LOADED CANOGA8 DEP ON THE GNS430 AND IT DID NOT CONTAIN THE INSTRUCTION OF CONTINUING ON 210 DEG HDG UNTIL LAX R-323 (GOR R-142) AND ACTUALLY TURNED THE PLANE TO IPIHO INTXN WHEN LEAVING THE RWY HDG. WHILE I FOCUSED ON PERFORMING THE AFTER DEP PROC I RELIED ON THE GPS TO FOLLOW THE PUBLISHED PROC AND DID NOT PAY ATTN TO THE DEV FROM THE PUBLISHED INSTRUCTIONS OF TURNING 210 DEGS UNTIL LAX R-323 AND THEN TO IPIHO/CASTA/GOR. THE GPS TURNED ME TOWARDS IPIHO INTXN AFTER LEAVING RWY HDG. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE REPORTER REALIZED IN RETROSPECT THAT HE WAS NOT AS FAMILIAR WITH THE DEPARTURE AS HE SHOULD HAVE BEEN. ADDITIONALLY; THE INFORMATION HE NEEDED TO MAINTAIN HEADING PRIOR TO THE RADIAL INTERCEPT WAS DEPICTED GRAPHICALLY AND SO HE WAS MISLED BY THE AUTOMATION INTO TURNING DIRECTLY TO A FIX AFTER A REQUIRED WAYPOINT CROSSING RESTRICTION WAS MET.