Community Plugin
View plugin on GitHubgatsby-remark-grid-tables 
This plugin parses custom Markdown syntax to describe tables. It just includes this package in the gatsby-remark chain
It’s useful for extending markdown tables to include things like rowspan, colspan etc.
It adds a new node type to the mdast produced by remark: gridTable.
A gridTable mdast node can contain the following mdast node types:
tableHeadertableRowtableCell
The stringified HTML result will be a table.
It is up to you to have CSS rules producing the desired result for these table.
Syntax
For example:
# Grid table
## Basic example
+-------+----------+------+
| Table Headings | Here |
+-------+----------+------+
| Sub | Headings | Too |
+=======+==========+======+
| cell | column spanning |
+ spans +----------+------+
| rows | normal | cell |
+-------+----------+------+
| multi | cells can be |
| line | *formatted* |
| | **paragraphs** |
| cells | |
| too | |
+-------+-----------------+produces:
<h1>Grid table</h1>
<h2>Basic example</h2>
<table>
<thead>
<tr>
<th colspan="2" rowspan="1"><p>Table Headings</p></th>
<th colspan="1" rowspan="1"><p>Here</p></th>
</tr>
<tr>
<th colspan="1" rowspan="1"><p>Sub</p></th>
<th colspan="1" rowspan="1"><p>Headings</p></th>
<th colspan="1" rowspan="1"><p>Too</p></th>
</tr>
</thead>
<tbody>
<tr>
<td colspan="1" rowspan="2"><p>cell
spans
rows</p></td>
<td colspan="2" rowspan="1"><p>column spanning</p></td>
</tr>
<tr>
<td colspan="1" rowspan="1"><p>normal</p></td>
<td colspan="1" rowspan="1"><p>cell</p></td>
</tr>
<tr>
<td colspan="1" rowspan="1"><p>multi
line</p><p>cells
too</p></td>
<td colspan="2" rowspan="1"><p>cells can be
<em>formatted</em>
<strong>paragraphs</strong></p></td>
</tr>
</tbody>
</table>Note: the top of a cell must be indicated by +- followed by some - or + and finished by -+.
So, this is not a correct cell:
+--+
|a |
+--+But, this is a correct cell:
+---+
| a |
+---+Installation
npm:
npm install remark-grid-tables