Fully lamellar gamma-TiAl based alloys with smaller volume fraction of alpha(2) are being considered for use in a number of high temperature structural applications. Under extreme operating conditions, the creep resistance of these alloys is greatly reduced due to the dissolution of the alpha(2) laths. Creep strengthening through the precipitation of intermetallic particles along the exposed alpha(2) / gamma interphase interfaces is possible. Fully lamellar, multicomponent TiAl based alloys have been alloyed with small amounts of light elements and have been creep tested at high temperatures in the as-solutionized condition or following an annealing treatment that optimizes the precipitate particle distribution. Microstructural evaluation of the resulting microstructures has been carried out to study how the intermetallic precipitation patterns developed may contribute to the effective stabilization of the alpha(2) / gamma type interfaces. It is shown that H-type carbides are the dominant creep strengthening elements. The findings of this work may also be used to improve key properties of functional two-phase lamellar intermetallic systems.