  We introduce \textit{GraphGPT}, a novel model for Graph learning by
self-supervised Generative Pre-training Transformers. Our model transforms each
graph or sampled subgraph into a sequence of tokens representing the node, edge
and attributes reversibly using the Eulerian path first. Then we feed the
tokens into a standard transformer decoder and pre-train it with the
next-token-prediction (NTP) task. Lastly, we fine-tune the GraphGPT model with
the supervised tasks. This intuitive, yet effective model achieves superior or
close results to the state-of-the-art methods for the graph-, edge- and
node-level tasks on the large scale molecular dataset PCQM4Mv2, the
protein-protein association dataset ogbl-ppa and the ogbn-proteins dataset from
the Open Graph Benchmark (OGB). Furthermore, the generative pre-training
enables us to train GraphGPT up to 400M+ parameters with consistently
increasing performance, which is beyond the capability of GNNs and previous
graph transformers. The source code and pre-trained checkpoints will be
released soon\footnote{\url{https://github.com/alibaba/graph-gpt}} to pave the
way for the graph foundation model research, and also to assist the scientific
discovery in pharmaceutical, chemistry, material and bio-informatics domains,
etc.
