Unfortunately no, there is currently no easy or straightforward way to do this with GemBox.Pdf.
You would need to read both text elements and path elements (lines) to achieve the desired extraction.
Note, we do have a feature request for this and please feel free to vote for it to increase its priority:
But I’m afraid that I cannot say when it will be available, this is not in our current roadmap so it won’t be done this year and for later I cannot say at this moment.
Last, we have this feature in our other component called GemBox.Document, see Read and extract PDF text in C# and VB.NET.
However, I must point out that GemBox.Document’s PDF reader never left the BETA stage, for more information read the Support level for reading PDF format (beta).