Edit: After doing some research, I did find that there was a proposal for a Qatar-Turkey pipeline in 2010 (see https://web.archive.org/web/20120228125310/http://pipelinesi... ). It was proposed to connect to Nabucco, which hasn't been built. The articles that link the Syrian civil war, or more specifically Qatari involvement in said war, contend that Qatar wants a Muslim Brotherhood government to build the pipeline, which ignores Saudi coolness to the idea of the pipeline (Saudi Arabia also funds rebels in the civil war) and the fact that Qatar also funded the uprisings in Libya and Egypt, in the path of no contended pipeline.
In other words, the idea that the Syrian civil war is mostly about gas pipelines looks rather like people trying to find some resource that the war must be about because they can't believe war is about anything other than resources.