On Thursday, approximately 10AM UTC, we'll be performing our MediaWiki 1.34 deployment. Please expect some downtime, we apologise in advance for any inconvenience!
You can embed Google Docs spreadsheets on your wiki using the <googlespreadsheet> tag.
You can display your spreadsheet by simply putting your document's key in-between the two <googlespreadsheet> tags. The default width is 500, default height 300 and default style is width:100%. You can change these using the relevant parameters, for example <googlespreadsheet width="600" height="200" style="width: 50%">Google Docs' key goes here</googlespreadsheet>.