Fractional Captain reported a total loss of GPS and failure of associated systems immediately after takeoff; and stated it may have been caused by a GPS jamming device or some other external cause.

Narrative

Immediately on departure off Runway 30R at BJC we experienced a total loss of GPS reception along with associated systems. We were busy flying so didn't have time to note everything that was affected but it was the typical stuff associated with loss of GPS; such as TAWS; synthetic vision; etc. The HSI (Horizontal Situation Indicator) seemed to continue to function fine and we were able to fly the assigned heading after takeoff. It did make a high workload departure even more demanding as we had that distraction plus a TCAS TA - not RA - plus Tower advising us of traffic and a turn all simultaneously. After about 60 - 90 seconds the GPS returned to working as normal. I suspected a GPS jammer was located near the end of the runway. We reported the GPS anomaly to ATC a minute or two later and another aircraft reported similar problems in the exact same area we had it. I also emailed the Chief Pilot to report it in case other Company aircraft were arriving or departing BJC or flying in the Denver area that day. We experienced no other GPS issues that flight or the rest of the day. We have had the aircraft for several days prior to this even with no GPS issues during that time either. No suggestions. I don't believe there were any malfunctions in the aircraft. I believe this was an external event likely caused by a local jammer or some other local anomaly that interfered with the GPS signal.