*** Update THR 20181004: In today's current version of Google Sheets, you can right-click a cell and select the "Get link to this cell" menu item, which copies a URL to the clipboard that will open the spreadsheet with the indicated cell in the upper left corner, subject to the limit of the existing rows and columns filling to the bottom and right edges respectively of the page. The URL is the same format as in the previous feature before this exposure in the Sheets UI, appending &range=<cell-A1-address>
to the #gid=<tab-GID>
fragment spec, eg:
https://docs.google.com/spreadsheets/d/1QSAJzpdM6z4haa-ah1HKqdy8U1vUxWmPIwplej-9fsI/edit#gid=907876553&range=C7
In today's (THR 20180607) current version of Google Sheets, you can open a sheet with a specified cell shown in the top left visible corner, by specifying the cell address as the range in the URL's fragment component. For example, cell C7 in Google's [Template] Google Sheets: Project plan sheet:
https://docs.google.com/spreadsheets/d/1QSAJzpdM6z4haa-ah1HKqdy8U1vUxWmPIwplej-9fsI/edit#gid=907876553&range=C7
Of course this same technique positions the top left cell of a multicell range in the top left visible corner of the sheet.
Note that the specified cell will be positioned in the window's scrolling viewport after any frozen rows/columns are applied to the view. You can get the complete URL, including the cell's fragment tuple, by right-clicking the cell, and in the popup context menu selecting "Get link to this cell".
The URL can be constructed programmatically, so any object in the sheet that can anchor a hyperlink URL can be linked to any cell/range for navigation to it. Therefore this technique is usable via the GUI, by cell formula/style, or by script - or by any external application/page.
It's disappointing that Google hasn't included in the basic Sheets GUI a field in which the user can enter a cell or range address to jump to that range by URL. Every serious spreadsheet application has had this basic feature since the 1980s.